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-rw-r--r--sysdeps/i386/bits/link.h65
-rw-r--r--sysdeps/i386/bits/linkmap.h5
-rw-r--r--sysdeps/i386/dl-machine.h128
-rw-r--r--sysdeps/i386/dl-trampoline.S182
4 files changed, 264 insertions, 116 deletions
diff --git a/sysdeps/i386/bits/link.h b/sysdeps/i386/bits/link.h
index 3be9b7e..985d040 100644
--- a/sysdeps/i386/bits/link.h
+++ b/sysdeps/i386/bits/link.h
@@ -1,5 +1,60 @@
-struct link_map_machine
- {
- Elf32_Addr plt; /* Address of .plt + 0x16 */
- Elf32_Addr gotplt; /* Address of .got + 0x0c */
- };
+/* Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _LINK_H
+# error "Never include <bits/link.h> directly; use <link.h> instead."
+#endif
+
+
+/* Registers for entry into PLT on IA-32. */
+typedef struct La_i86_regs
+{
+ uint32_t lr_edx;
+ uint32_t lr_ecx;
+ uint32_t lr_eax;
+ uint32_t lr_ebp;
+ uint32_t lr_esp;
+} La_i86_regs;
+
+/* Return values for calls from PLT on IA-32. */
+typedef struct La_i86_retval
+{
+ uint32_t lrv_eax;
+ uint32_t lrv_edx;
+ long double lrv_st0;
+ long double lrv_st1;
+} La_i86_retval;
+
+
+__BEGIN_DECLS
+
+extern Elf32_Addr la_i86_gnu_pltenter (Elf32_Sym *__sym, unsigned int __ndx,
+ uintptr_t *__refcook,
+ uintptr_t *__defcook,
+ La_i86_regs *__regs,
+ unsigned int *__flags,
+ const char *__symname,
+ long int *__framesizep);
+extern unsigned int la_i86_gnu_pltexit (Elf32_Sym *__sym, unsigned int __ndx,
+ uintptr_t *__refcook,
+ uintptr_t *__defcook,
+ const La_i86_regs *__inregs,
+ La_i86_retval *__outregs,
+ const char *symname);
+
+__END_DECLS
diff --git a/sysdeps/i386/bits/linkmap.h b/sysdeps/i386/bits/linkmap.h
new file mode 100644
index 0000000..3be9b7e
--- /dev/null
+++ b/sysdeps/i386/bits/linkmap.h
@@ -0,0 +1,5 @@
+struct link_map_machine
+ {
+ Elf32_Addr plt; /* Address of .plt + 0x16 */
+ Elf32_Addr gotplt; /* Address of .got + 0x0c */
+ };
diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index c48d9d3..e1cc10e 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -129,7 +129,8 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
{
got[2] = (Elf32_Addr) &_dl_runtime_profile;
- if (_dl_name_match_p (GLRO(dl_profile), l))
+ if (GLRO(dl_profile) != NULL
+ && _dl_name_match_p (GLRO(dl_profile), l))
/* This is the object we are looking for. Say that we really
want profiling and the timers are started. */
GL(dl_profile_map) = l;
@@ -154,112 +155,18 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
destroys the passed register information. */
/* GKM FIXME: Fix trampoline to pass bounds so we can do
without the `__unbounded' qualifier. */
-#define ARCH_FIXUP_ATTRIBUTE __attribute__ ((regparm (3), unused))
+#define ARCH_FIXUP_ATTRIBUTE __attribute__ ((regparm (3), stdcall, unused))
-static ElfW(Addr) fixup (struct link_map *__unbounded l,
- ElfW(Word) reloc_offset)
+extern ElfW(Addr) _dl_fixup (struct link_map *__unbounded l,
+ ElfW(Word) reloc_offset)
ARCH_FIXUP_ATTRIBUTE;
-static ElfW(Addr) profile_fixup (struct link_map *l, ElfW(Word) reloc_offset,
- ElfW(Addr) retaddr)
+extern ElfW(Addr) _dl_profile_fixup (struct link_map *l,
+ ElfW(Word) reloc_offset,
+ ElfW(Addr) retaddr, const void *regs,
+ long int *framesizep)
ARCH_FIXUP_ATTRIBUTE;
# endif
-/* This code is used in dl-runtime.c to call the `fixup' function
- and then redirect to the address it returns. */
-# if !defined PROF && !__BOUNDED_POINTERS__
-# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\
- .text\n\
- .globl _dl_runtime_resolve\n\
- .type _dl_runtime_resolve, @function\n\
- " CFI_STARTPROC "\n\
- .align 16\n\
-_dl_runtime_resolve:\n\
- " CFI_ADJUST_CFA_OFFSET (8) "\n\
- pushl %eax # Preserve registers otherwise clobbered.\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %edx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- movl 16(%esp), %edx # Copy args pushed by PLT in register. Note\n\
- movl 12(%esp), %eax # that `fixup' takes its parameters in regs.\n\
- call fixup # Call resolver.\n\
- popl %edx # Get register content back.\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- popl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- xchgl %eax, (%esp) # Get %eax contents end store function address.\n\
- ret $8 # Jump to function address.\n\
- " CFI_ENDPROC "\n\
- .size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
-\n\
- .globl _dl_runtime_profile\n\
- .type _dl_runtime_profile, @function\n\
- " CFI_STARTPROC "\n\
- .align 16\n\
-_dl_runtime_profile:\n\
- " CFI_ADJUST_CFA_OFFSET (8) "\n\
- pushl %eax # Preserve registers otherwise clobbered.\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %edx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- movl 20(%esp), %ecx # Load return address\n\
- movl 16(%esp), %edx # Copy args pushed by PLT in register. Note\n\
- movl 12(%esp), %eax # that `fixup' takes its parameters in regs.\n\
- call profile_fixup # Call resolver.\n\
- popl %edx # Get register content back.\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- popl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- xchgl %eax, (%esp) # Get %eax contents end store function address.\n\
- ret $8 # Jump to function address.\n\
- " CFI_ENDPROC "\n\
- .size _dl_runtime_profile, .-_dl_runtime_profile\n\
- .previous\n\
-");
-# else
-# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\n\
- .text\n\
- .globl _dl_runtime_resolve\n\
- .globl _dl_runtime_profile\n\
- .type _dl_runtime_resolve, @function\n\
- .type _dl_runtime_profile, @function\n\
- " CFI_STARTPROC "\n\
- .align 16\n\
-_dl_runtime_resolve:\n\
-_dl_runtime_profile:\n\
- " CFI_ADJUST_CFA_OFFSET (8) "\n\
- pushl %eax # Preserve registers otherwise clobbered.\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %edx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- movl 16(%esp), %edx # Push the arguments for `fixup'\n\
- movl 12(%esp), %eax\n\
- pushl %edx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %eax\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- call fixup # Call resolver.\n\
- popl %edx # Pop the parameters\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- popl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- popl %edx # Get register content back.\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- popl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- xchgl %eax, (%esp) # Get %eax contents end store function address.\n\
- ret $8 # Jump to function address.\n\
- " CFI_ENDPROC "\n\
- .size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
- .size _dl_runtime_profile, .-_dl_runtime_profile\n\
- .previous\n\
-");
-# endif
#endif
/* Mask identifying addresses reserved for the user program,
@@ -375,9 +282,14 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rel *reloc,
return value;
}
+
+/* Names of the architecture-specific auditing callback functions. */
+#define ARCH_LA_PLTENTER i86_gnu_pltenter
+#define ARCH_LA_PLTEXIT i86_gnu_pltexit
+
#endif /* !dl_machine_h */
-#ifdef RESOLVE
+#ifdef RESOLVE_MAP
/* The i386 never uses Elf32_Rela relocations for the dynamic linker.
Prelinked libraries may use Elf32_Rela though. */
@@ -422,7 +334,7 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc,
#endif /* !RTLD_BOOTSTRAP and have no -z combreloc */
{
const Elf32_Sym *const refsym = sym;
-#if defined USE_TLS && !defined RTLD_BOOTSTRAP
+#ifndef RTLD_BOOTSTRAP
struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
Elf32_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value;
#else
@@ -549,14 +461,8 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
# ifndef RESOLVE_CONFLICT_FIND_MAP
const Elf32_Sym *const refsym = sym;
# endif
-# ifdef USE_TLS
struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
Elf32_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value;
-# else
- Elf32_Addr value = RESOLVE (&sym, version, r_type);
- if (sym != NULL)
- value += sym->st_value;
-# endif
switch (ELF32_R_TYPE (reloc->r_info))
{
@@ -692,4 +598,4 @@ elf_machine_lazy_rela (struct link_map *map,
#endif /* !RTLD_BOOTSTRAP */
-#endif /* RESOLVE */
+#endif /* RESOLVE_MAP */
diff --git a/sysdeps/i386/dl-trampoline.S b/sysdeps/i386/dl-trampoline.S
new file mode 100644
index 0000000..80dd300
--- /dev/null
+++ b/sysdeps/i386/dl-trampoline.S
@@ -0,0 +1,182 @@
+/* PLT trampolines. i386 version.
+ Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+
+ .text
+ .globl _dl_runtime_resolve
+ .type _dl_runtime_resolve, @function
+ cfi_startproc
+ .align 16
+_dl_runtime_resolve:
+ cfi_adjust_cfa_offset (8)
+ pushl %eax # Preserve registers otherwise clobbered.
+ cfi_adjust_cfa_offset (4)
+ pushl %ecx
+ cfi_adjust_cfa_offset (4)
+ pushl %edx
+ cfi_adjust_cfa_offset (4)
+ movl 16(%esp), %edx # Copy args pushed by PLT in register. Note
+ movl 12(%esp), %eax # that `fixup' takes its parameters in regs.
+ call _dl_fixup # Call resolver.
+ popl %edx # Get register content back.
+ cfi_adjust_cfa_offset (-4)
+ popl %ecx
+ cfi_adjust_cfa_offset (-4)
+ xchgl %eax, (%esp) # Get %eax contents end store function address.
+ ret $8 # Jump to function address.
+ cfi_endproc
+ .size _dl_runtime_resolve, .-_dl_runtime_resolve
+
+
+ .globl _dl_runtime_profile
+ .type _dl_runtime_profile, @function
+ cfi_startproc
+ .align 16
+_dl_runtime_profile:
+ cfi_adjust_cfa_offset (8)
+ pushl %esp
+ cfi_adjust_cfa_offset (4)
+ addl $8, (%esp) # Account for the pushed PLT data
+ pushl %ebp
+ cfi_adjust_cfa_offset (4)
+ pushl %eax # Preserve registers otherwise clobbered.
+ cfi_adjust_cfa_offset (4)
+ pushl %ecx
+ cfi_adjust_cfa_offset (4)
+ pushl %edx
+ cfi_adjust_cfa_offset (4)
+ movl %esp, %ecx
+ subl $8, %esp
+ cfi_adjust_cfa_offset (8)
+ movl $-1, 4(%esp)
+ leal 4(%esp), %edx
+ movl %edx, (%esp)
+ pushl %ecx # Address of the register structure
+ cfi_adjust_cfa_offset (4)
+ movl 40(%esp), %ecx # Load return address
+ movl 36(%esp), %edx # Copy args pushed by PLT in register. Note
+ movl 32(%esp), %eax # that `fixup' takes its parameters in regs.
+ call _dl_profile_fixup # Call resolver.
+ cfi_adjust_cfa_offset (-8)
+ movl (%esp), %edx
+ testl %edx, %edx
+ jns 1f
+ popl %edx
+ cfi_adjust_cfa_offset (-4)
+ popl %edx # Get register content back.
+ cfi_adjust_cfa_offset (-4)
+ popl %ecx
+ cfi_adjust_cfa_offset (-4)
+ xchgl %eax, (%esp) # Get %eax contents end store function address.
+ ret $16 # Jump to function address.
+
+ /*
+ +32 return address
+ +28 PLT1
+ +24 PLT2
+ +20 %esp
+ +16 %ebp
+ +12 %eax
+ +8 %ecx
+ +4 %edx
+ %esp free
+ */
+ cfi_adjust_cfa_offset (12)
+1: movl %ebx, (%esp)
+ cfi_rel_offset (3, 0)
+ movl %edx, %ebx # This is the frame buffer size
+ pushl %edi
+ cfi_adjust_cfa_offset (4)
+ cfi_rel_offset (7, 0)
+ pushl %esi
+ cfi_adjust_cfa_offset (4)
+ cfi_rel_offset (6, 0)
+ leal 44(%esp), %esi
+ movl %ebx, %ecx
+ movl %esp, %edi
+ subl %ebx, %edi
+ andl $0xfffffff0, %edi # Align stack
+ movl %esp, %ebx
+ cfi_def_cfa_register (3)
+ movl %edi, %esp
+ shrl $2, %ecx
+ rep
+ movsl
+ movl (%edi), %esi
+ cfi_restore (6)
+ movl 4(%edi), %edi
+ cfi_restore (7)
+ /*
+ %ebx+40 return address
+ %ebx+36 PLT1
+ %ebx+32 PLT2
+ %ebx+28 %esp
+ %ebx+24 %ebp
+ %ebx+20 %eax
+ %ebx+16 %ecx
+ %ebx+12 %edx
+ %ebx+8 %ebx
+ %ebx+4 free
+ %ebx free
+ %esp copied stack frame
+ */
+ movl %eax, (%ebx)
+ movl 12(%ebx), %edx
+ movl 16(%ebx), %ecx
+ movl 20(%ebx), %eax
+ call *(%ebx)
+ movl %ebx, %esp
+ cfi_def_cfa_register (4)
+ movl 8(%esp), %ebx
+ cfi_restore (3)
+ /*
+ +40 return address
+ +36 PLT1
+ +32 PLT2
+ +28 %esp
+ +24 %ebp
+ +20 %eax
+ +16 %ecx
+ +12 %edx
+ +8 free
+ +4 free
+ %esp free
+ */
+ subl $20, %esp
+ cfi_adjust_cfa_offset (20)
+ movl %eax, (%esp)
+ movl %edx, 4(%esp)
+ fstpt 8(%esp)
+ fstpt 20(%esp)
+ pushl %esp
+ cfi_adjust_cfa_offset (4)
+ leal 36(%esp), %ecx
+ movl 56(%esp), %eax
+ movl 60(%esp), %edx
+ call _dl_call_pltexit
+ movl (%esp), %eax
+ movl 4(%esp), %edx
+ fldt 20(%esp)
+ fldt 8(%esp)
+ addl $60, %esp
+ cfi_adjust_cfa_offset (-60)
+ ret
+ cfi_endproc
+ .size _dl_runtime_profile, .-_dl_runtime_profile
generated by cgit v1.1 at 2024-11-08 05:07:25 +0000